I'm currently playing the Imperial campaign and trying to finish the mission where I must destroy five specific planets with the Death Star. I already beaten the mission where I must capture the "traitor" Admiral Kalast; however, once I reach Polus' orbit (the 4th planet I'm about to destroy), Admiral Kalast is actually defending the planet.

Also, once I wipe out the planet and the remaining Rebel forces from the map, it does not declare a victory, my ships just float around searching for nothing.

Is this a bug? Any suggestions on how to fix it? I loaded previous games and re-entered into orbit, with and without the Death Star. Neither way gives me the option to "auto-resolve". Thanks in advance.